Very similar to Hemaris fuciformis and distinguishable with certainty only by the genitalia.
Male genitalia: Similar to Hemaris fuciformis but: Right harpe reduced to a short, blunt, barely differentiated lobe.
Scratchpads developed and conceived by (alphabetical):
Ed Baker,
Katherine Bouton
Alice Heaton
Dimitris Koureas,
Laurence Livermore,
Dave Roberts,
Simon Rycroft,
Ben Scott,
Vince Smith